PUBLIC WORKS BUREAU > The Work of the Public Works Bureau > Current of sewerage
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Current state of sewerage
 
Osaka City's sewerage system seen through numbers
99.9%
Wastewater treatment and flushing toilet services cover 99.9% of the population.
2,844,000 m3/day
Twelve sewage treatment plants can treat 2,844,000 m3 of sewage a day, which is equivalent to approx. 2.4 Osaka Dome Stadiums.
4,830 km
The network of sewer pipes (from 20 cm to 6.5 m in diameter) in place in the city extends a total distance of 4,830 km.
12
The city has 12 sewage treatment plants.
57
There are 57 pump stations in operation.
1,328m3/sec.
In total, the pumping facilities at pump stations and sewage treatment plants are capable of discharging approx. 1,328 m3 of water per second, which is equivalent to about 6,600 oil drums.
600 tons
Sewage treatment, etc. generates approx. 600-700 tons of sludge a day. The sludge is reduced to approx. one eighth in volume through incineration and reclaimed. Efforts are also made to recycle sludge as construction material.
76.9%
Osaka City is working on improvement of the sewerage system to handle heavy rains of 60 mm an hour (considered to occur in a roughly 10-year cycle). This sewerage system services 76.9% of the area in which measures are taken against rainwater.
 
(March 31, 2005)
 
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